Syringe



(ModeL) H. READ.

SYRINGE.

No. 427,111. Patented May 6, 1890.

MW W; M QZ NITED STATES HORATIO READ, OF JERSEY CITY, NEW JERSEY.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 427,111, dated May 6, 1890.

Application filed August 5,1887- SerialNo.2 l6,238. (Model) To all whom it may concern.-

Be it known that I, HoRATIo READ,of J ersey City, in the State of New Jersey, have invented an Improvement in Syringes, of which the following is a specification, reference being had to the accompanying drawings, form-v ing a part of the same.

The invention consists in the construction, combination, and arrangement of parts, hereinafter described and claimed.

In the following drawings, Figure 1 is a perspective view of an ordinary syringe having my improvement attached thereto. Fig. 2 is a vertical section of the auxiliary bulb disconnected.

A represents the ordinary compressiblebulb usually employed in syringes.

and B, having placed in it the usual educ-' tion-valve.

Running through the center of the hollow bulb B, and secured at one end thereof to the tube D and at the other end to the tube F, is a rigid core E, hollow at either end for a short space, the remainder thereof being solid. In the hollow portion of said core at the tube D end thereof, and at a proper distance from the joint-say a quarter of. an inch, though so much is not necessarya hole b is made in order to allow the liquid as it is forced outlet is provided for the liquid as it flows into and fills the bulb B, by means of the opening or hole I)", through which it flows to the outlet-tube F, and thence out of the discharge-nozzle II. The opening or hole I),

It is made of rubber or other suitable substance and used being of larger diameter than the opposite hole I)", it will be seen that a larger flow of liquid will go into the chamber B than can flow from it through the smaller opening 1)", thereby causing the liquid in the chamber B to become compressed, which compression will suffice to continue the flow of the liquid through the opening I), and consequently out of the discharge-nozzle, even after the supply through 1) has ceased during the refilling of bulb A. It is evident, however, that the holes 1) b may each be, made of the same size without departing from the spirit of my invention, and it is also evident that the opening or passage in each end of the core may have two or more branch passages, which communicate with the interior of the b ulb instead of one, as at present shown.

The operation of my improved syringe is substantially as follows: The contracting and expanding of the bulb A causes it to become filled with the liquid. A second pressure closes the induction-valve and the liquid is forced through the tube D, and through that it passes into the hollow portion of core E, and thence into bulb B, by means of inletopening I). This opening I), being of alarger diameter than the outlet-opening Z)", at the opposite end of the chamber B, as before explained, admits the liquid to the chamber faster than it can escape therefrom. Thus the chamber is quickly filled, and the continued admission of liquid through the inlet 1') causes a pressure in the chamber B, which is of sufficient force to cause the liquid to flow out through the outlet-opening b in a steady stream while the bulb A is being recharged.

VVhat I claim, and desire to secure by Letters Patent, is-

In a syringe, the combination, with the usual compressible suction-bulb, of the hereiii-described flexible auxiliary bulb, forming a part of and located in the discharge-tube, and provided with the core E-traversing its length, said core having openings at each end to admit the liquid into the bulb, and to allow it to pass out therefrom, the ingress opening being larger than the egress-opening, substantially as described, and for the purpose specified.

HORATIO READ. Witnesses:

OHAs. R. CLARKE, FRANK BUTLER. 

